What Inveribrate Can I Keep In My Sump?

[1234-fishy-freind]

I was thinking if there is anything small that i could keep in a section of my sump to make it more interesting.

The area something would be able to have would be:
-55cm long
-30cm wide
-21cm high
working out at 35 litres.
So is there anything invert wise that i could keep in there ?

thanks

 

[thomas10051988]

how about a predatory crab or a mantis shrimp

 

[Musho3210]

i would go with a predatory crab that is easy to find, something like a gorilla crab (common live rock hitchhiker)

 

[1234-fishy-freind]

What about a shrimp of some sort, like a boxer ?
I fnot, i will go with some sort of crab.